What are some alternatives?
When comparing Google Contacts Map and Radiate, you can also consider the following products
Cardhop - The Mac contacts app you'll want to use.
Pokadot - Meet people with similar interests at cool experiences in SF
Swarmly - Waze for people. See where everyone is in realtime
Highlight - "Highlight" physical books through conductive pages 📖✨
Friend Theory - Connect with your friends' friends
The Contact Guru - Managing your contact list so you don't have to